One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,4,3)(5,6,9,10)(7,11,12,8)(14,15)(16,20)(21,22,25,23)(24,27,28,26)(6,10)(8,11)(13,14,17,15)(16,19,20,18)(22,23)(24,28)(1,2,4,3)(13,14,17,15)(16,18,20,19)(21,23,25,22)(24,27,28,26)(1,3,4,2)(5,7,9,12)(6,11,10,8)(13,15,17,14)(16,19,20,18)(5,8,9,11)(6,12,10,7)(13,16,17,20)(14,18,15,19)(21,24,25,28)(22,26,23,27)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.